Association between mean annual exposure of the home address to locally generated primary PM10 and prevalence of respiratory symptoms in young children
| Unadjusted | Adjusted* | |||||
|---|---|---|---|---|---|---|
| OR† | 95% CI | n‡ | OR† | 95% CI | n‡ | |
| OR, odds ratio; CI, confidence interval. | ||||||
| *Adjusted for confounding variables in table 1. | ||||||
| †Per μg/m3 increase in locally generated primary PM10. | ||||||
| ‡Number of responses. | ||||||
| Cough without a cold | ||||||
| 1998 | 1.22 | 1.10 to 1.36 | 2567 | 1.21 | 1.07 to 1.38 | 2164 |
| 2001 | 1.46 | 1.27 to 1.68 | 2301 | 1.56 | 1.32 to 1.84 | 1756 |
| Night time cough | ||||||
| 1998 | 1.11 | 1.01 to 1.23 | 2579 | 1.06 | 0.94 to 1.19 | 2174 |
| 2001 | 1.25 | 1.09 to 1.43 | 2318 | 1.25 | 1.06 to 1.47 | 1771 |
| Current wheeze | ||||||
| 1998 | 0.99 | 0.89 to 1.10 | 2584 | 0.99 | 0.88 to 1.12 | 2175 |
| 2001 | 1.09 | 0.93 to 1.30 | 2331 | 1.28 | 1.04 to 1.58 | 1774 |